/*
 * Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */

package org.evosuite.testcase.localsearch;

import org.evosuite.ga.localsearch.LocalSearchObjective;
import org.evosuite.testcase.TestChromosome;
import org.evosuite.testcase.execution.ExecutionResult;
import org.evosuite.testcase.statements.PrimitiveStatement;

/**
 * <p>
 * BooleanLocalSearch class.
 * </p>
 *
 * @author Gordon Fraser
 */
public class BooleanLocalSearch extends StatementLocalSearch {

    private boolean oldValue;

    /* (non-Javadoc)
     * @see org.evosuite.testcase.LocalSearch#doSearch(org.evosuite.testcase.TestChromosome, int, org.evosuite.ga.LocalSearchObjective)
     */

    /**
     * {@inheritDoc}
     */
    @SuppressWarnings("unchecked")
    @Override
    public boolean doSearch(TestChromosome test, int statement,
                            LocalSearchObjective<TestChromosome> objective) {

        PrimitiveStatement<Boolean> p = (PrimitiveStatement<Boolean>) test.getTestCase().getStatement(statement);
        ExecutionResult oldResult = test.getLastExecutionResult();
        oldValue = p.getValue();

        p.setValue(!oldValue);

        if (!objective.hasImproved(test)) {
            // Restore original
            p.setValue(oldValue);
            test.setLastExecutionResult(oldResult);
            test.setChanged(false);
            return false;
        } else {
            return true;
        }
    }

}
